A Schenectady man who served time for murdering a pizza delivery man as a teenager was convicted Friday of assaulting his ex-girlfriend in front of her 1-year-old child.

Isaiah Curry, 28, of Schene-ctady faces up to 30 years in prison, prosecutors said.

"This is an individual who has nothing but violence in his past and any time he gets a chance to be released, he continues his violent tendencies," said Assistant District Attorney Brian Gray, who prosecuted the case.

Curry was 15 years old in 2000 when he and two friends lured a Domino's pizza delivery man into an empty apartment at Yates Village and assaulted him. The victim, 38-year-old Hassan Noorzai, was killed. A father, the victim delivered pizzas part-time. Curry pleaded guilty to murder in a plea deal. In return for testifying against other defendants, he was sentenced to 10 years to life. He served 10 years and was released in 2011 on lifetime parole.

While living at the Altamont Program on Duane Avenue, Curry violated parole by threatening staff members with violence, testing positive for marijuana and leaving the premises without permission, prosecutor Gray said. He was sent back to prison and released again in April 2013.

A month later, Curry tested positive for drugs and joined a treatment program. He did not follow treatment and stopped contacting his parole officer.

Curry resurfaced last September when he assaulted his ex-girlfriend in Yates Village during a dispute over a cellphone, according to the district attorney's office. Curry slammed her into a metal screen door, injured her ankle and ripped her house key out of her hand.

The assault happened in front her 1-year-old daughter. Curry then broke into her house and continued to punch her in the face. He ransacked the house, pulling food out of the refrigerator and tossing a mirror and toiletries. The victim was treated at Ellis Hospital.

On Friday, a jury convicted Curry of assault, burglary, robbery, grand larceny, criminal mischief and endangering the welfare of a child. The robbery and burglary charges carry the heftiest sentences — 15 years each. Gray said he will ask the judge on July 18 to sentence Curry to the maximum on each count and for the sentences to run consecutively, so that Curry will spend 30 years in prison.

"He's never shown us that he can be a law-abiding citizen," Gray said.